Means for operating reciprocating conveyers or screens.



.UNITED STATES PAI-ENT- oiiFIoE; s I' j RICHARD s. JAOOBSEN, or CHICAGO, ILLINOIS, AssIGNoR To JAcoBsnN a SCHBAEDER, INCORPORATED, OF CHICAGO, ILLINOIS, A CORPORATION.

A MEANS FOIipPERA'IING REOIPROQATING coNvEYnss on SCREENS.

Specification of Letters Patent.

' Patenten Dec. 31, 191s.

Original application lcilunei 24, 1915,.,Sxleria1 No. 36,)l07.y Divided and this application led September 27,

c i916. serial In. 122,425. .l i i To all whom it may concern:

v Be it known that I, RICHARD S. .JAoonsnie a subject of the King of Norway, residing 1n the city of Chicago, county of Cook, and i State of Illinois, have invented certain new and useful Improvements in Means for Operating. Reciprocating Conveyers or Screens, of

which the following is aspecication.

This is a divisional application of my application for patent for improvements in apparatusfor conveying materials tiled June 24, 1915, Ser. No.l 36107 and embraces. particularly the means for driving such con' veying apparatus or screens,

rFhis in\'eiition `i'elates to a novel mechanism for driving convcyers or screens' with a reciprocating motion wherein the forward and backward strokes .of each revolution, respectively," progressively. increase and diminish in speed'lfor the greater part ot' their travel. That is, this progresslve acceleration or retardation applied to approximately two-thirds of the stroke, the last third being utilized iiiireversing and thereby reducing the shock which would occur in a sudden reversal.

Much time and study has been devoted to the reduction o r elimination of this reaction or shock due to the reversal at the end of. the strokes and as a result, heavy exiwnsive and complicated mechanisms ha ve been devised, and in some cases heavy iy wheels and massive foundations were provided. ln all of these instances, the costly mechanisms and supporting structures would not permit the use of the same for conveying puii'ioses, and in many installations the mechanisms were fractured due to such shock or slight. devia.-

tion from the essential alinement of shafts or other parts. lt is therefore, an object of this invention to overcome these disadvantages and to produce a mechanism oty such character that will coiiil'iine eiliciency and. simplicity, and one that shall he low in original cost and maintenance to permit the adoption of the same for conveying purposes.

In contrariistinction from the known devices the followingr ad vantages and new uses are'obtained by the 'use ot this invention.l

First: The conveying trough can he made in two sections, each having a separate drive mechanism connected to and actuatedby a common. drive shaft, said niechamsms being arranged 0n said Shaft in Such manner, thatthe momentum of the trough sectionsl will 55 duced costs.

Second: With this apparatus, the mate-l rial can be conveyed forwardton one trough and in reverse direction on the other trough',

by arranging the troughsin stepped relation,

oneaboyev the other and mounting .their driving mechanismsin opposite relative positions on the common drive shaft, thereby `adapting this apparatus to screening and grading. In this case, also, the momentum of one screen will. counter-balance the mo- .70

mentum of the other.

Third: Any number of mechanisms can bemounted on and actuated by a common drive shaft.

The driving mechanism for imparting they 75 desired motion to the conveying trough is constructed and arranged for producing a progressively increasing and decreasing speed.

To eliminate any shock due to thechange in motion from thed progressively increased forward direction to the progressively decreased backwardmoven'ient, this progressive acceleration or progressi ve retardation,

respectively. has only y,been appliedto approximately two-thirds of the stroke, the last tliiril being utilized in reversing` and thereby avoiding the shock which would result from a sudden sharp reversal. i

This particular motion is obtained and imparted to the conveying trough. through the emplovment of an eccentric disk', rotating about and guided by an eccentric sleeve, in.

such manner.' that' th-e distance from the center ofl saideccentric to the center of. the

drive shaft. is constantly and uniformly changing between the maximum and minimum. l A i To these -and other purposes my invention consistshin the novel construction. con'ibina tion. proyision. and relative-position-ofpartsand members "set forth in the following. specification and accompanying drawings, and more particularly brought out in. the claims. l i

spending parts, Figure 1. is an elevation u los.l ieferring to the drawings in which likeV vreference characters indicate like orL corretaken on line l--l showing my improved mechanism for imparting the hereinvdescribed motion to thc. conveying trough.

Fig. '2 is a section taken on line of* Fig. l.

Fig. 3 shows a sectional elevation of my invention taken on line 3 3 ot lig. 4, as

vapplied to a pair of balanced troughs ary ranged to convey the material in a forward direction on the top trough and in reverse direction on the lower trough. Fig. 3, also `shows ordinary rollers tor guiding the troughs in straight longitudinal motions.

Fig. l is a half plan ot' Fig. 3.

Figs. 5 and t3 illustrate the motion and speed diagrams ofthe troughs conveying material in opposite directions. y

Fig.' 't' shows the application o't my invention to a pair of balanced troughs' arranged to convey the material forwardly, from one trough to the other.

Fig. 8 is a halt' plan of Fig. T.

i Figs. J and l() illustrate, respectively, a side elevation andy section of a modified centric disk and erank-arm construction with the link omitted.

Referring to the drawing and particularly to Figs. 1 and 2, I providel an eccentric sleeve 13 which may be securely supported on the concrete pier liby means ol bolts 15 and which is arranged to support the drive sha t't 16 eccentrically with relation to the center 'line 17 of the sleeve l?, and whose. extending ends 12V are.. ol slightly decreased diameter to tit' the bore ot' the disks 18. The hub end ol the crank arm 19 is rigidly connectedto the drive shalt '1G by means otf key NSA and the other end is connected with the disk lo by means of link 2t) and bolts or pins 2l and 2:3. 2t) beingklesigned comparatirely shorter than the crank arms t9.

The outer eccentric member is composed much ot' two sections 1S^ and 1H securely bolted.

together with thel bolts l". An extending web 1li" and a pair ot' tlanges 18": ati'ord a rigid connection lor the connecting rod 2th The vdistance between the center ot' the outside diameter of the eccentric sleeve. end 13A and the center of the eccentric disk 18 is designated as -X and the. distanceshetween the'center of the outside diameter ot' the eccentric sleeve end 13A and the center of thedrive'yshaft 1G are designated by ,Y and'lfZ?. The revolution ofthe drive shaft` 16 will cause the eccentric disk 18: to rotate about the center ot' drivel shaft 1G, through the (means of the keyed crank arm 1 9 and link 20, with a progressively increasing and decreasing speed whose maximum and minimum corresponds to theI sum and difference of X and Y,

' Attention is called to the relative mounting ot' the right and left hand eccentric disks Huch links and 2. The momentum of the upper trough acting on the drive shatt is counter-acted by the momentun'i of the lower trough acting on the same shaft and the resulting moment transmitted to the supporting structure through sleeves 13 is equal to the difference of said momentums. l

ln Figs. 3 to t3 inclusive. a form ot' my invention is representedn for `horii'iontally 75 conveying material in two'directions, 'torward and backward. Both upper and lower troughs are composed of the side channels 24^ and bottom plate A cross rod 2G is mounted in the bearings 27 which are suit.- 80 ably and rigidly connected with the trough. pair of connectingr rods 23 connect the lcross rod 26 with the impelling eccentric disks ltythrough members 18^ and 1,8.

rl`he impulse imparted to the material on the lower conveying trough in Fig. 3 whercby it travels in the reverse direction and discharges through opening 25", is attained by the use ot' the opposite hand eccentric disks lo and sleeves 125, as shown on the halt' pian 90 Fig. 4.

belt driven pulley-28 keyed to the drive shatt 1o imparts power thereto from any i well known source of power. ,k pair of standard bearing" boxes t5 may be'piovided 95 for the drive shaft ends. .7'

tetex-ring now to Figs. i); yand 4 I provide flanged rollers 29 which suitably support thc conveying troughs. 4 Figs. 5 andrt represent the motion and 10e need tliagrain s"nf the lower and upper troughsl respectively shown by Figs. 3 and l. The speed increases approximately unil'orudyl or progressively from u to .71. de creases quickly l'rom ."1 to c. increases again 105 l'rom r to fl' in the same manner, and-tinally is retarded uniformly 'troni f/ to f1.. According to Figs. 'i and t this progressively accelerated or retarded motion. respect ively. takes place during about seventy-tive per cent. of k cach revolution and seventy per cent. oi' the st rokc. The itl-ier part ol' the motion serves for the reversal ot the moving partsand ought not be made smaller it' the device is to la worked without injurious shock.

lt will be observed that the speed ot the forward and backward strokes ot' each revolution are reversedly identical and that the;l strokes progressively increase and diminish in speed `for the greater part of their travel. 1920A Figs. 7 and 8 illustrate an application of the pair ofy eccentric disks 18 and eccentric .bearing 13 shown in detail by Figs. lA and' .o

site hand, balanced eccentric disks. so that themotin of the material on both troughsis in the same direction. 'The end, Shaft 136 nassaui this case,` the belt driven pulley 46 is'over-` hung at one end. of the drive shaft 16. The connecting rods 23 and rollers 29 are similar to those above described. t

Figs. t) and 10 illustrate a modified fori of my invention. In this construction, the

link 20 and pins or bolts 2l and 22 are omit? ted and a pair of lugs 47 extend from the tace of the eccentric disk 48 and continually y embrace the straight crank-arm 49. as it rotates about the drive shaft 16 to which it is keyed and as it slides between the planes 7^ ofthe lugs 47.

Other parts of the mechanism are similar in construction to that shown by Figs. 1 and 2, and in operation, it is obvious that as the drive shaft 16 rotates clockwise, the straight crank-arm fit) being keyed to said shaft lo will rotate about the same and cause the eccentric disk i8 to revolve about the supporting eccentric' sleeve end 13A. The relative position of the centers of drive shaft 16, the eccentric disk 48 and the outside diameter of the eccentric sleeve end 13A.

is substantially identicalv with the centers of the mechanism herein described and illustrated by Figs. l and 2.

i claim:

l, Means for operating reciprocating conveyers or screens comprising a uniformi rotating drive shaft, a bearing for said shaft having an eccentric mounting, the center of said -shatt being non-coincident with the verti Aal and horizontal center lines of said eccentric mounting, a driving crank arm rigid with said shai't` a disk loosely mounted on said eccentric mounting, operating members engaging with said disk, and means 'comprising a link comparatively shorter than said crankarm whereby said disk is held iii-constant connection with said crank 'for receiving power therefrom for imparting to said inen'ibers a recilirocating motion wherein the speeds ot' the forward and backward strokes n" each revolution are reversedl)v identical and wherein such strokes progressively increase and diminish in speed for the greater part of their travel,

Means tor operating reciprocating conveyors or screens, comprising astraight drive shaft, a plurality ot bearings for supporting said shaft eccentricall \P with. relation to the verticaland horizontal center lines of thc outside diameter of jtheciids thereof, mechanism including eccentric disks mounted on the ends of saidbcarings, crank 'arms rigidly connected to said drive shaft, a link connecting each crank arm with an eccentric disk, said links being comparatively shorter than said crank arms, and connecting rods extending from said mechanism and pivotally supported at their other ends, the momentum of one rod counteracting the momentum of another rod, said mechanism imparting avreciprocatory motion wherein the speed ot the forward and backward strokes of each `revolution are reversedly identical and wherein such strokes progressively increase and diminish in speed for the greater partof their travel.

3. Means for operating reciprocating conveyers or screens comprisinga straight continuous drive shaft, a mechanism including a ,driving crank mounted on said shaft, an eccentric bearing held in constant fixed re-` lation to the center'4 ot' revolution of said driving crank, thelcenter of said shaft being non-coincident with the vertical and horizontal center lines of said bearing, a` power-transmitting eccentric disk arranged to rotate about Said eccentric bearing, operating members connected to said mechanism,`xneans whereby said eccentric disk is connected to said crank to receive power therefrom for imparting to said members a progressively accelerating motion in one di# rection with a reverse movement quick at first and progressively retarded in speed in the opposite direction whereinthe speed of the forward and backward strokes of cach revolution-are reversedly identical, the momentum of said members` counter-acting each other, said acceleration and retardation vbeing for the greater part of each stroke.

4. Means for operating reciprocating conveyers or-screens, comprising a drive shaft, a plurality of bearings for supporting said l shaft eccentrically with relationl to the vertical and horizontal center lines of the outer, diameter of the ends of said bearings, eccentric disk mechanisms mounted on the eccentric ends of said bearings, crank arms rigidly connected to said drive shaft, a link connecting each crank arm with an eccentric disk mechanism, said links being comparatively shorter. than' said crank arms, and connecting means extending `directly from said disk mechanisms for imparting a reciprocating motion substantially as described. i k

Means for operating reciprocating conve vers or screens, comprising la drive shaft, a liearing support-ing said shaft eccentrically in relation to the vertical and hori-` zontal center lines ot the outer diameter of f the end of said bearing, a crank arm rigidlyv mounted `on said shaft, aneccentric disk mounted on tht-:eccentric end of said bear` ing, a link onnecting the lcrank arm` with the eccentrlc disk, said link being compara# tively shorter than'said crank arm, and a connecting rod extending from its support directly7 to said disk for actuating said support with a reciprocating motion whereinthe speed of the forward 'and backward strokes',` of each revolution are reversedly identical vandwherein such strokes, respec- Mees, the center of said silziftvbein ventexf lines of said exterior bearing surfeeei and driving eennections between said shaft 19 und the driven member.

In witness wheieof, l have hereunto subscribed my mmm this 18th day `of Septexm ber, 1916.

RienARD s. .LeiecisiiiqT f 

